Title:
Frequency measuring apparatus
United States Patent 2933682
Inventors:
Moulton, Arthur B.
Webb, Joseph A.
Publication Date:
04/19/1960
Export Citation:
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Assignee:
GEN DYNAMICS CORP
Primary Class:
324/76.47
Other Classes:
324/76.44, 324/76.52, 324/76.55, 324/76.82, 327/6, 327/12
International Classes:
G01R23/00; G01R25/00
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US Patent References:
2858425Digital discriminator
2767312Signal distribution system
2762949Comparator circuit
2731566Frequency stabilizing device
2677104Frequency measuring instrument
2615127Electronic comparator device
2595263Apparatus for measuring the phase shift between the input and output voltages of a circuit under test
2543058Triggered frequency control
2474253Means for measuring difference in frequency of alternating currents
2452960Method and apparatus for indicating frequency coincidence between alternating currents or voltages